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leonid [27]
3 years ago
5

in a test tube, there is 4 ML of oil and 6 ML of water. What volume percent of liquid in your test tube is oil? Show a ratio of

oil to water.
Mathematics
1 answer:
Nady [450]3 years ago
4 0
3:2, easy. 

the rest you dont need to read i just need 20 characters to "explain it well".
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3 years ago
A motorboatcan go 8 miles downstream on a river in 20 minutes. It takes 30 minutes for the boat to go upstream the same 8 miles.
True [87]
<span>Let m = speed of motorboat
and c = speed of current
.
When going downstream, current speed is added to boat speed -- and, the total speed is "8 miles downstream in 20 minutes"
.
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(8 miles/20 mins) * (60 mins/1 hour) = 24 mph
.
This gives us our first equation (1):
m+c = 24
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When going upstream, the boat speed is reduced by the current -- and, the total speed is "8 miles in 30 minutes".
To convert to "miles per hour" we multiply by 60 mins per 1 hour:
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.
This gives us our second equation (2):
m-c = 16
m = 16+c
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m+c = 24
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16+2c = 24
2c = 8
c = 4 mph </span>
5 0
3 years ago
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